/Engine/Plugins/Runtime/OpenXR/Source/OpenXRHMD/Public/IOpenXRExtensionPlugin.h
Add any action sets provided by the plugin to be attached as active to the session This allows a plugin to manage a custom actionset that will be active in xrSyncActions
virtual void AttachActionSets ( [TSet](API\Runtime\Core\Containers\TSet)< XrActionSet > & OutActionSets )